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Finding the Fourth Proportional to 21,903.25, 32,856.13 and 7,113.43

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Solution

The fourth proportional to 21,903.25, 32,856.13 and 7,113.43 is: 10,670.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,903.25 : 32,856.13 = 7,113.43 : x
  2. Step 2: Convert to fraction form
    21,903.25/32,856.13 = 7,113.43/x
  3. Step 3: Cross multiply
    21,903.25x = 32,856.13 × 7,113.43
  4. Step 4: Simplify right side
    21,903.25x = 233,719,780.83
  5. Step 5: Solve for x
    x = 233,719,780.83/21,903.25
  6. Step 6: Final answer
    x = 10,670.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.